粘性Service

 1 import android.app.Activity;
 2 import android.content.Intent;
 3 import android.os.Bundle;
 4 
 5 public class MainActivity extends Activity {
 6 
 7     @Override
 8     protected void onCreate(Bundle savedInstanceState) {
 9         super.onCreate(savedInstanceState);
10         setContentView(R.layout.activity_main);
11         
12         startService(new Intent(getApplicationContext(),PushService.class));
13     }
14 
15     
16 
17 }

 1 import java.util.List;
 2 
 3 import android.app.ActivityManager;
 4 import android.app.ActivityManager.RunningServiceInfo;
 5 import android.app.Service;
 6 import android.content.Intent;
 7 import android.os.IBinder;
 8 
 9 public class PushService extends Service {
10 
11     @Override
12     public void onCreate() {
13         // TODO Auto-generated method stub
14         super.onCreate();
15         
16         new SeekServiceThread().start();
17     }
18     
19     @Override
20     public int onStartCommand(Intent intent, int flags, int startId) {
21         return Service.START_STICKY;//绮樻?Service鏍囪瘑锛屽綋Service缁勪欢鍦ㄩ潪鎰忔効鏃惰鍋滄鍚庯紝鏈夋満鐜囬噸鍚?    
22         }
23     
24     @Override
25     public IBinder onBind(Intent intent) {
26         // TODO Auto-generated method stub
27         return null;
28     }
29     
30     
31     //鏌ユ壘褰撳墠缁勪欢鐨勭嚎绋嬶紝濡傛灉褰撳墠姝ｈ繍琛岀殑鏈嶅姟缁勪欢涓嶅寘鍚玃ushService缁勪欢鏃讹紝鍒欏惎鍔?    
32     class SeekServiceThread extends Thread{
33         
34         @Override
35         public void run() {
36             
37             while(true){
38                 
39                 //1.鑾峰彇Activity缁勪欢绠＄悊鍣紙绠＄悊褰撳墠搴旂敤鐨勮繘绋嬨?鏈嶅姟缁勪欢銆佷换鍔℃垨鍥為?鏍堬級
40                 ActivityManager mgr=(ActivityManager) getSystemService(ACTIVITY_SERVICE);
41                 
42                 //2. 鑾峰彇姝ｈ繍琛岀殑鏈嶅姟缁勪欢
43                 List<RunningServiceInfo> rServices = mgr.getRunningServices(100);
44                 
45                 boolean isFinded=false;//鏍囪瘑鏄惁鏌ユ壘鍒板綋鍓嶇殑service缁勪欢
46                 for(RunningServiceInfo rService:rServices){
47                     if(rService.getClass().getName().equals(PushService.class.getName())){
48                         isFinded=true;
49                     }
50                 }
51                 
52                 if(!isFinded){ //濡傛灉娌℃湁鏌ユ壘鍒帮紝鍒欏惎鍔ㄦ湰鏈嶅姟缁勪欢
53                     
54                     startService(new Intent(getApplicationContext(),PushService.class));
55                 }
56                 
57                 try {
58                     Thread.sleep(2000);
59                 } catch (InterruptedException e) {
60                     e.printStackTrace();
61                 }
62             }
63             
64         }
65     }
66 
67 }